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The effects of a warm spring on phytoplankton and zooplankton population dynamics in small eutrophic lakes in the Canadian prairies : implications of a changing climate

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dc.contributor.author Dupuis, Alain en_US
dc.date.accessioned 2012-06-12T20:14:07Z
dc.date.available 2012-06-12T20:14:07Z
dc.date.issued 2008 en_US
dc.identifier (Sirsi) a1881115 en_US
dc.identifier.uri http://hdl.handle.net/1993/8038
dc.description.abstract Climate projections predict warming trends for the Canadian prairies. This study investigated effects of warmer spring temperatures on phytoplankton-zooplankton populations in small eutrophic lakes. A two-year study of three eutrophic lakes with contrasting spring weather conditions, i.e., 2005 - a 'normal' spring and 2006- a warm spring (+2oC), demonstrated that warmer water temperatures were associated with increased total phytoplankton and relative cyanobacteria biomass and a shift in zooplankton dominance from daphniids to rotifers. Zooplankton hatching experiments and computer simulations tested the hypothesis that a warm spring differently affected daphniid and rotifer emergence from resting eggs. Experimental conditions mimicking an earlier spring (shorter photoperiod) resulted in fewer daphniid but not rotifer hatchlings, and computer simulations indicated that these changes in hatching success could be responsible for shifts from daphniid- to rotifer-dominated systems. Overall, a warm spring negatively affected daphniid populations, indirectly by increasing cyanobacteria prevalence and directly by decreasing hatching success. en_US
dc.format.extent 7681917 bytes en_US
dc.language en_US
dc.rights en_US
dc.title The effects of a warm spring on phytoplankton and zooplankton population dynamics in small eutrophic lakes in the Canadian prairies : implications of a changing climate en_US
dc.degree.discipline Zoology en_US


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